Have your husband see his dentist, this could be several things and you don't want it to get any worse. Best wishes.
bernice9,
Is bleeding spontaneous or only happens upon provocation? Spontaneous would be tasting blood in mouth, waking up with blood on the pillow. Bleeding upon provocation would be bleeding during eating, flossing, brushing teeth.
Does he have any sort of bad taste/smell inside his mouth?
Does the tissue around gums peel off/slough off?
Did anything change in his diet? Anything change at all? Type of toothpaste perhaps?
When was the last time he saw dentist/had his teeth cleaned by hygienist?
Are there are multiple sores? Are these sores painful? Color, radius, etc. Does he have any type of Herpes?